How to "simplify" an entire project in order to import it in another?
As you're a beginner (it seems) you can:
- Save your .blend fila with another name - select your model - got to the modifiers tab in the properties window and press the "apply" button on all the modifiers you don't need (armature, cloth, etc.) Start applying the modifiers from the upper (first calculated) to the lower (last).
Then delete the armature and everything you don't need, save the new file, close it and then reopen. - Import you model from this new file.